click the flag press F to toggle your fps (Frames Per Second) the screen will refresh if your fps gets too low (15-) press L to toggle lag free mode press T to toggle the ability to change the length of each "tail" made with pen :D
i hope you like my idea of a screen refresh :D i mean it's not an original idea but i just thought it would be a nice thing to add in :3 just thought i would make a quick project :D the lag is because of a bunch of clones mixed with small pen size, stamping, and pen. Just use lag mode to get rid of it this took less than an hour to create